5325 results about "Measurement device" patented technology

There is provided an inside-diameter measuring unit capable of automating inside-diameter measurement and a control method for automatic inside-diameter measurement. An inside-diameter measuring part is supported by a support frame part via a floating joint part. The floating joint part includes a rotation-allowing mechanism part and a translation-allowing mechanism part. A measuring head part of the inside-diameter measuring part is inserted into a hole by a robot arm part. The inside-diameter measuring part adjusts its position and posture autonomously by the reaction force when a contact point pushes against the inner wall of the hole to align the axis of the inside-diameter measuring part with the axis of the hole. An electric inside-diameter measuring unit can automatically measure the inside diameter of a hole.

The invention discloses a high-sensitivity miniaturized HOx free radical accurate measurement device and method, and relates to the technical field of atmospheric environment detection and automatic control, and the device is composed of a free radical generation and removal device, a light source module, longitudinal HOx double cavities, a gas distribution module and a collection and control system. The free radical generation and removal device can generate HOx free radicals or remove OH free radicals; the light source module can emit laser which enables OH free radicals to generate fluorescence and transmit the laser into the longitudinal HOx double-cavity; the longitudinal HOx double cavities are used for exciting OH free radicals to generate a large amount of fluorescence and collecting and converting the fluorescence into electric signals; the gas distribution module is used for injecting gas in the device and maintaining the flowing state of gas flow; and the control and acquisition system is used for controlling automatic operation and data acquisition and processing of the device. The device has the advantages of being high in detection sensitivity, small in size and capable of rapidly obtaining and removing OH free radical measurement interference, rapid calibration of similar concentration can be conducted on the actual HOx concentration in the actual measurement environment, accurate spectrum determination can be conducted on the laser wavelength, and therefore high-sensitivity accurate measurement of HOx free radicals is achieved.

Disclosed in the present invention are a wind field correction method and system applied to a single-station remote sensing device. The method comprises the following specific steps: S1, acquiring wind field data by means of a data information acquisition apparatus, and obtaining radial wind speed information of a current acquisition point by means of a data processing module; S2, on the basis of the hypothesis of an uniform wind field, using a classical wind speed reconstruction algorithm for inversion to obtain a three-dimensional wind speed vector of the acquisition point; S3, establishing an error model; and S4, on the basis of an error factor β calculated by means of the error model, performing data correction on the three-dimensional wind speed vector of the acquisition point obtained by means of inversion in S2. Compared with the prior art, the present invention provides a high-precision correction method, which can be operated on low-end hardware, and can also be directly installed and operated on hardware of a measurement device, so that measurement results can be corrected in real time, no additional complexity can be brought to users, and costs are reduced; and the present invention is suitable for solving complex system problems when accurate boundary conditions cannot be obtained.

The invention discloses a shallow hidden fire area radon gas in-situ tracing accurate identification and definition prevention and control system, belongs to the technical field of mine fire prevention and control, and aims to construct a dynamic monitoring, accurate delineation and targeted plugging multi-cooperation closed-loop governance chain and an in-situ radon detection and identification monitoring unit. Drilling, cup burying and sampling integrated operation is completed, and a radon gas concentration abnormal signal is monitored in real time; the radon measurement magnetic method fire area precise delineation unit is used for quantitatively delineating a fire source prevention and control area in a grading manner by fusing a radon gas magnetic field two-parameter ring type measurement network layout and combining an intersection and union set abnormal area division method and a comprehensive abnormal index threshold value method; according to the earth surface crack self-adaption blocking treatment unit, a dynamic shoveling solidified slurry precise blocking device is adopted, and efficient treatment of the shallow buried coal seam hidden fire area is achieved by separating an earth surface and an underground air leakage channel through bucket prepared soil screening and conveying, instant slurry preparation through a synthesis system, directional slurry spraying through a blocking mechanism and crawler belt ballasting dense blocking.

The invention discloses a method for measuring a detection inclination angle of a two-component atomic shearing interferometer. The method comprises the following steps: constructing an inclination angle set of an angle swinging device; when the atoms are acted by the pi Raman laser and the second pi / 2 Raman laser, the reflecting mirror rotates by an angle; alternately detecting multiple groups of odd-numbered groups and even-numbered groups; traversing all dip angles in the dip angle set; and fitting and calculating the actual included angle of the longitudinal direction of the imaging surface of the CCD camera relative to the Z-axis direction. The invention further discloses a measuring device for the detection inclination angle of the two-component atom shearing interferometer. According to the method, an existing atom shearing interferometer can accurately measure the inclination angle of a detection system of the atom shearing interferometer, so that the problems of noise and system errors caused by the fact that the inclination angle of the detection system of the atom shearing interferometer does not return to zero are solved, and drifting of differential measurement of the two-component atom interferometer caused by inclination angle changes is restrained.

A radar based, fill level measuring device for determining fill levels in containers, wherein the fill level measuring device can be applied for a large number of different applications, includes a signal production unit designed to produce a first transmitted radar signals within a first frequency band and supplementally a second transmitted radar signal within a second frequency band that does not overlap with the first frequency band and is clearly separated therefrom. The evaluation unit of the fill level measuring device can determine a first fill level value based on the first received signal. Based on the second received signal potentially another fill level value can be determined. In this way, the fill level measuring device can be adapted as regards frequency band to the particular application. The ascertained fill level can be checked for plausibility by comparing the fill level values ascertained in different frequency bands.

There is provided an inside-diameter measuring unit capable of automating inside-diameter measurement and a control method for automatic inside-diameter measurement. An inside-diameter measuring part is supported by a support frame part via a floating joint part. The floating joint part includes a rotation-allowing mechanism part and a translation-allowing mechanism part. A measuring head part of the inside-diameter measuring part is inserted into a hole by a robot arm part. The inside-diameter measuring part adjusts its position and posture autonomously by the reaction force when a contact point pushes against the inner wall of the hole to align the axis of the inside-diameter measuring part with the axis of the hole. An electric inside-diameter measuring unit can automatically measure the inside diameter of a hole.

The invention relates to the technical field of laser transmission characteristic testing, in particular to a medium-wave infrared laser long-distance transmission attenuation characteristic external field testing method and device. The method is an indirect measurement method, a diffuse reflection plate is set up at a designated position of a transmission path, laser reaching the diffuse reflection plate is quantitatively measured through a detector, in combination with a bidirectional reflection distribution function of the diffuse reflection plate, the target reaching power of the laser transmitted through the long-distance atmosphere is obtained, and the target reaching power is calculated by comparing the target reaching power with the laser output power of a transmitting end. The laser long-distance transmission power attenuation characteristic can be obtained, and the problems that in current laser atmospheric transmission attenuation characteristic measurement, a laser radar does not have a medium-wave infrared measurement method, and the power of a specified position of a transmission path cannot be directly received and measured through a detector due to the fact that the size of a light spot is too large after long-distance transmission in direct measurement are solved. The measuring device is simple in structure and can support indirect measurement to obtain the long-distance transmission power attenuation characteristics of the medium-wave infrared laser.

The invention belongs to the technical field of water quality monitoring, and discloses a reclaimed water reuse landscape water quality change monitoring method and system, and the method comprises the steps: obtaining original measurement data of a target index in a water body and a plurality of environment background parameters representing a water body environment background; analyzing and calculating a dynamic influence relationship between the original measurement data of the target index and each environment background parameter to obtain a state parameter representing a measurement deviation state of the target measurement device; determining a correction value corresponding to the current environment background and the measurement deviation state of the target measurement device by using a pre-established knowledge base according to the plurality of environment background parameters and the state parameters; correcting the original measurement data of the target index by using the correction value to obtain the corrected measurement data of the target index for evaluating the long-term influence of the reclaimed water on the aquatic ecological environment; an evaluation result is sent to a remote monitoring center; therefore, accurate measurement data can be provided, and reliable long-term influence evaluation is realized.

The invention discloses a vertical shaft construction measuring device, which relates to the technical field of laser measurement and comprises a laser plumb aligner main body, a chassis, a dial, a pointer, a laser plummet, a base and an adjusting knob. When laser measurement is carried out, a laser plummet is turned on firstly, a focused light spot directly irradiates a well bottom mark point, an initial position P1 is recorded, then a plurality of angles are rotated to record P2, P3 and P4, diagonal lines are connected to obtain a reference point, and the instrument is adjusted to enable the light spot to coincide with the reference point to complete calibration so as to measure shaft deformation. Stepped vibration induction is achieved through cooperation of a trigger block and trigger teeth, manual errors are avoided, meanwhile, friction force is increased through cooperation of a resistance block and a sliding rod, fine adjustment is assisted, in addition, through cooperation of a locking rod and a first connecting groove, the angle is locked under the gravity effect, position movement is prevented, and double-hand unlocking is achieved through cooperation of the connecting rod, a first magnetic block and a second magnetic block; safety specifications are compulsively met, and laser measurement accuracy is guaranteed through multiple measures.

The rotary kiln cylinder centerline measuring and adjusting device comprises a rotary kiln body, wherein several groups of measuring device assemblies are arranged inside the rotary kiln body, a laser theodolite is arranged outside the rotary kiln body, and a target plate is arranged inside the rotary kiln body; the measuring device assembly comprises a support shell, wherein two groups of support seats extending to the outside of the support shell are slidably arranged inside the support shell, a first ball seat is fixed to the outer wall of one side of the support shell, and a telescopic rod is rotatably arranged at the other end of the first ball seat; by rotating the handle, the inner rotating rod can be driven to rotate, and under the mutual cooperation of pushing the rotating rod and the inner sliding seat, one end of the two groups of support seats can be driven to slide into the support shell; at this time, the measuring device assembly is hoisted into the rotary kiln by a crane, and then the handle is released. Under the restoring force of the telescopic spring, the ends of the two groups of support seats can be made to tightly contact with the inner wall of the rotary kiln, thereby greatly improving the stability of the measuring device assembly.

A calibration unit comprises a first port which is arranged for being connected to a measurement device; a calibration module comprising at least three different calibration standards for calibrating the measurement device; and a switching module configured to connect the first port with one of the at least three different calibration standards of the calibration module. A daisy chain port is arranged for being connected to a further calibration unit, to an external power meter, or to a device-under-test, DUT. The first port is connectable to the daisy chain port. An internal power meter is arranged within a housing of the calibration unit. The first port is connectable to the internal power meter; or an internal impedance tuner. The first port is connectable to the internal impedance tuner.

The invention discloses a device and method for measuring the abrasion amount of a spray needle of an impulse turbine, and the device comprises a fixed platform which is used for placing the spray needle to be measured, and the spray needle to be measured is provided with a plurality of points to be measured; the inner and outer slide rails are arranged at the top of the fixed platform, are positioned on the outer side of the to-be-measured spray needle and axially coincide with the to-be-measured spray needle; the rotating platform is in sliding connection with the inner and outer sliding rails and can rotate around the to-be-measured spray needle; the telescopic platform is arranged at the top of the rotating platform, and the end, away from the rotating platform, of the telescopic platform is connected with an inclined platform; the distance measuring probe system is detachably connected to the inclined platform, and the measuring end of the distance measuring probe system faces the to-be-measured spray needle; the measuring device is combined with a multi-degree-of-freedom adjusting mechanism to realize accurate positioning and vertical alignment of the probe, then the probe system is used for reading the displacement and deducting the thickness of the sleeve to obtain the real abrasion depth, non-destructive high-precision abrasion amount detection of any point of a complex curved surface can be realized, and the measuring device is suitable for a hydropower station overhaul site.

The invention discloses a measuring method, a measuring device and a measuring system for a pole piece. The measuring device acquires a first image of a to-be-measured pole piece acquired by an image acquisition assembly; identifying a measurement object of the to-be-measured pole piece in the first image to obtain a measurement object identification result; wherein the measurement object recognition result comprises at least two feature points on the measurement object; identifying a scale on a passing roller in the first image to obtain a scale identification result; wherein the scaleplate is arranged along the peripheral surface of the passing roller in a surrounding manner in the circumferential direction; the scaleplate identification result comprises at least one of scale marks, flag bits and positions of the scaleplate; the flag bit is used for indicating a preset position of the scale surrounding the peripheral surface of the passing roller; the position is the side edge position of the scale in the axial direction of the passing roller; and determining a size measurement result of the measurement object based on the measurement object recognition result and the scale recognition result. Based on the scheme, the accuracy and efficiency of pole piece measurement can be effectively improved.

There is provided an inside-diameter measuring unit capable of automating inside-diameter measurement and a control method for automatic inside-diameter measurement. An inside-diameter measuring part is supported by a support frame part via a floating joint part. The floating joint part includes a rotation-allowing mechanism part and a translation-allowing mechanism part. A measuring head part of the inside-diameter measuring part is inserted into a hole by a robot arm part. The inside-diameter measuring part adjusts its position and posture autonomously by the reaction force when a contact point pushes against the inner wall of the hole to align the axis of the inside-diameter measuring part with the axis of the hole. An electric inside-diameter measuring unit can automatically measure the inside diameter of a hole.

The invention belongs to the technical field of thickness measurement, and particularly relates to a reinforcing steel bar protective layer thickness measuring device which comprises a measuring cylinder, a positioning clamping mechanism, an automatic thickness measuring mechanism, a perpendicularity detection feedback mechanism, a measurement result confirmation mechanism and a reinforcing steel bar diameter synchronous feedback mechanism. The device can rapidly, automatically and accurately detect the thickness of the steel bar protective layer, automatically adjust the perpendicularity of the thickness measuring mechanism and the reinforced concrete formwork, ensure the accuracy of the detection position, and avoid inaccurate measurement caused by perpendicularity errors; whether a measurement result is in an allowable error range can be automatically and quickly judged based on a thickness measurement result, whether the result is qualified is quickly and automatically compared and confirmed, and the measurement efficiency is improved; the diameter of the steel bar can be synchronously detected and fed back when the device is fixed, an allowable error value of a protective layer thickness measurement result is automatically adjusted based on the diameter of the steel bar, the larger the diameter is, the smaller the allowable error value is, and accurate feedback of a detection result is ensured.

The present invention discloses an elastic modulus measuring device and a measuring method. Among them, the elastic modulus measuring device includes: a base; a first shielding member located on the base; a second shielding member vertically arranged on the base; the first shielding member and the second shielding member cover the surfaces on different sides of the sample to be measured and form a cavity for accommodating the sample to be measured; a test piece located on the first shielding member and the second shielding member and attached to the sample to be measured, the test piece is configured to obtain the deformation amount of each surface of the sample to be measured placed in the test environment; and a measuring unit configured to obtain the bulk elastic modulus of the sample to be measured based on the deformation amount. The measuring device of the embodiment of the present invention effectively improves the measurement accuracy and measurement efficiency, and has a wide application prospect.

The invention discloses a device for acoustically monitoring suspended sediment concentration and section particle size mean value of an ocean and a river, and relates to the technical field of ocean and river water environment monitoring. The four groups of piezoelectric ceramic transducers at the transmitting end are used for transmitting sound pulses with multiple frequencies into the same water body, and the broadband hydrophone array at the receiving end is used for synchronously receiving acoustic backward scattering signals which are scattered back. Wavelet threshold denoising and frequency domain filtering are combined, acoustic back scattering signals are preprocessed, turbulence and biological noise are eliminated, nonlinear errors caused by the particle size-concentration coupling effect are solved through an inversion algorithm fusing attenuation and scattering signals and in combination with a dynamic hierarchical data processing technology, and the accuracy of the acoustic back scattering signals is improved. The device realizes high-precision real-time measurement of suspended sediment parameters in ocean and river environments, has the capability of adaptive correction of environmental parameters, and is suitable for scientific research and engineering monitoring scenes.

A centrifugal separation system includes a centrifugal separator, a liquid feed mixture conduit, a light phase conduit, a heavy phase conduit, and a flow control system. The flow control system includes a controller, a flow control valve arranged in a light phase conduit, a liquid feed mixture measuring device, and at a light phase measuring device and / or a heavy phase measuring device. The controller is configured to control the flow control valve based on measurements from the liquid feed mixture measuring device and measurements from the light phase measuring device and / or the heavy phase measuring device.

The invention discloses a space magnetic field automatic measurement control system and method, and relates to the technical field of magnetic field measurement. The system comprises a guide rail erected on the inner side of the annular coil and arranged in the axial direction of the annular coil; the measuring device comprises an omnibearing measuring assembly and a supporting part used for supporting the omnibearing measuring assembly. One part of the supporting part is assembled in the guide rail, and the omnibearing measurement assembly comprises a magnetic measurement sensor, a radial driving module, an angular driving module and an axial driving module and is used for measuring magnetic field data of any radial position, any angular direction and any axial position in the annular coil; and the control device is used for respectively controlling the radial driving module, the angular driving module and the axial driving module so as to drive the magnetic measurement sensor to measure magnetic field data at a specified position. According to the invention, precise positioning of a three-dimensional space magnetic field, space omnibearing measurement and space omnibearing automatic control are realized.

The utility model relates to the technical field of housing construction engineering, and discloses a housing construction engineering positioning and measuring device which comprises a supporting table, a supporting rod is movably connected in the supporting table in a penetrating mode, a measuring instrument is fixedly connected to the upper end of the supporting rod, and a supporting mechanism is arranged on the lower surface of the supporting table. A rack is fixedly connected to the left side surface of the supporting rod, and an adjusting mechanism is arranged on the upper surface of the supporting table and located on the left side of the supporting rod. According to the utility model, in the aspect of height adjustment, through the linkage design of the supporting rod and the rack and the combination of a mechanical locking mechanism of the gear, the ratchet wheel and the pawl, stepless precise adjustment of the measuring instrument is realized, and the motor fault risk and power consumption are avoided; in addition, the rotating rod can be locked through the positioning bolt after adjustment is completed, accidental displacement of the measuring instrument is prevented, and the reliability of the device is further improved. According to the design, through a pure mechanical structure, the height adjusting process is simplified, the maintenance cost is reduced, and the device is particularly suitable for engineering scenes in a power-free environment.

The invention relates to the technical field of trajectory measurement, discloses an underwater riprap particle motion trajectory measurement device and method, and aims to realize high-precision response tracking of stress and motion trajectory of riprap particles around a foundation under dynamic water scouring based on an underwater positioning unit sensing array and a high-frequency sampling particle motion and attitude detection technology. The technical problem that the motion characteristics of a single riprap particle cannot be observed in previous riprap protection research is solved. Through combined measurement of acceleration and angular velocity data collected by the inertial measurement unit and absolute position measured by the radio frequency unit, the three-dimensional motion condition, track and attitude process of a unit space as well as two-dimensional displacement images of a riprap surface and a vertical flow section are accurately reconstructed; and a centimeter-level-precision visual data support and a low-cost research means are provided for foundation scouring and coastal slope protection and riprap protection research, so that the engineering cost is saved.

The invention belongs to the field of near-inertia internal wave modeling, and particularly relates to a near-inertia internal wave modeling method based on a reverse echo observation array, which comprises the following steps: arranging a reverse echo measurement device array in an observation area, and acquiring echo signals from the seabed to the sea surface; performing data cleaning and band-pass filtering on the signals, and extracting near-inertia internal wave signals; calculating the depth and the relative vorticity of a mixed layer by combining historical temperature-salinity data; calculating a wind input energy flux by using the wind stress data; calculating a net level energy flux by adopting a boundary integration method; judging whether the boundary energy flux influence is smaller than a threshold value or not, and if not, adjusting array layout; and finally establishing a multivariable linear model containing wind energy input, mixed layer depth, relative vorticity and energy flux. According to the method, the temporal-spatial resolution and prediction precision of near-inertia internal wave modeling are effectively improved, the problems that in a traditional method, the boundary effect is remarkable, and multi-factor comprehensive modeling is insufficient are solved, and the method is suitable for long-term efficient monitoring of a large-range marine environment.

Provided is a temperature measurement device for, in a situation where the temperature of a silicon wafer which is a measurement target is indirectly measured, removing, from actually measured radiance, the effects of radiance coming from a chamber member, and calculating the amount of change in the temperature of the measurement target. The temperature measurement device comprises: a chamber for accommodating a measurement target object; a heating unit; a chamber window at a position in the chamber opposite from the measurement target object; a temperature measurement unit for measuring the temperature of the measurement target object and the chamber window; and a computation unit for calculating the temperature of the measurement target object from detected values of the temperature measurement unit. The computation unit is provided with: a conversion unit for generating, from actually measured temperatures calculated from the detected values of the temperature measurement unit, conversion data pertaining to the amount of change in the temperature of the measurement target object corresponding to the amount of change in the temperature of the chamber window; a condition acquisition unit for acquiring a condition under which the measurement target object is heated; a detected value acquisition unit for acquiring a detected value of the temperature measurement unit; and a temperature correction unit for estimating the temperature of the measurement target object by using the conversion data to correct an actually measured temperature calculated from the detected value of the temperature measurement unit.

The invention belongs to the technical field of engineering surveying, and particularly relates to an on-site measuring device for building design, which comprises measuring equipment, the measuring equipment comprises a tripod, a total station is arranged at the top of the tripod, a hard light environment can be shielded through a sliding cylinder, the influence of ambient light on laser is avoided, and the measuring precision is improved. Meanwhile, a conical column can be inserted into soil through a conical structure at the bottom of the conical column, so that the stability of the device during operation can be improved, and then detection errors caused by shaking of the device can be reduced; the adaptability of the device to grounds with different hardness is improved through the arrangement of a first spring, then the applicability of the device can be improved, when the opposite sides of the two sliding plates abut against each other, the sliding plates and the arc-shaped plates can form a relatively closed environment, and therefore the influence of the external environment on light beams generated by the laser head is further reduced; and the accuracy of identifying and calibrating the laser beam by the instrument is improved.

The invention provides an ore grinding efficiency optimization method and system based on ore quantity measurement. Comprising the following steps of S1, real-time ore quantity metering and data collection, wherein an ore quantity metering device is installed at an ore feeding port of the ore grinding process, and ore quantity data entering ore grinding equipment are collected in real time; meanwhile, a plurality of sensors are arranged in the ore grinding equipment and related processes, and ore property data, ore grinding equipment operation parameter data and ore grinding product quality data are collected. According to the ore grinding efficiency optimization method and system based on ore quantity metering, data are collected in real time through the high-precision ore quantity metering device and multiple sensors, accurate sensing of ore quantity fluctuation and ore property changes is achieved, the problem that parameter adjustment is not in time due to manual judgment delay or errors is solved, and the ore grinding efficiency optimization efficiency is improved. And the real-time performance and accuracy of the ore grinding process are improved.

A method of monitoring a condition prevailing inside a piping system with respect to an impairment due to accretion, abrasion or corrosion caused by fluid(s) flowing through the piping system is disclosed, comprising the steps of: installing at least two measurement devices susceptible to an impairment and configured to measure variables indicative of the impairment; wherein the measured variables include at least two variables exhibiting a different dependency on the impairment; continuously recording data including time series of measured values of the variables measured; based on training data included in the data determining a dynamic reference behavior of the variables corresponding to time dependent distributions of values of the variables to be expected of the measured values when the measurement devices are unimpaired; repeatedly determining a deviation between a monitored behavior of the measured values of the variables and the reference behavior.

The invention relates to the technical field of profound hypothermia metering, and provides a low-temperature flow measuring device, an error calibration method and a measuring method.The device comprises a fluid source used for providing low-temperature fluid; an inlet of the measuring pipeline is connected with a fluid source; the measuring pipeline is connected with a detected flowmeter; the standard receiving tank is connected with the outlet of the measuring pipeline, and the standard receiving tank and the outlet of the measuring pipeline have two states of connection and disconnection; the static weighing module is used for statically weighing the standard receiving tank in a static measurement mode; and the dynamic weighing module is used for enabling the standard receiving tank to be separated from the static weighing module in the dynamic measurement mode and dynamically weighing the standard receiving tank. Through the arrangement, the final dynamic measurement result can ensure the traceability to the quality and the accuracy of the time reference, and has the advantages of continuous monitoring, rich data and efficient operation of the dynamic method, so that a high-performance dynamic flow measurement reference with both the accuracy of the static method and the continuity of the dynamic method is constructed.

A system for insitu AESA calibration includes a radar receiver / excitor (XR). The calibrated XR functions as a precision multi-channel relative amplitude and phase microwave frequency measurement device that executes a known AESA calibration methodology. An integrated RF sensor system-level built in test (BIT) is utilized for prognostic health monitoring and self-healing calibration. During calibration, quadrants of the AESA are iteratively calibrated via measurements by the XR. I / Q values are balanced for each quadrant relative to each other without the need for a separately calibrated measurement device for absolute calibration. A near field probe may be disposed for radiative loopback measurements. A T / R calibration circuit receives the loopback measurements and data from a Tx channel.

The invention discloses a multi-target three-dimensional measurement device and method based on a double-optical-comb femtosecond laser radar, and relates to the field of femtosecond laser measurement, and the device comprises a double-optical-comb laser source, a single-detector time-sharing switching receiving module, a beam splitting and optical switch module and a scanning galvanometer module which are connected in sequence, and further comprises a single-detector time-sharing switching receiving module, a beam splitting and optical switch module and a scanning galvanometer module which are connected in sequence. The signal control processing module is connected with the single-detector time-sharing switching receiving module, generates a reference pulse signal and a target pulse signal based on the above modules, carries out distance calculation according to the reference pulse signal and the target pulse signal of each target light path, determines a to-be-measured distance of a target object, and sends the to-be-measured distance to the single-detector time-sharing switching receiving module; and performing three-dimensional reconstruction on the target object according to the to-be-measured distance of the target object and the angle information of the scanning galvanometer, and generating a point cloud or a three-dimensional profile diagram of the target object in the current scene, so that the system implementation difficulty and the measurement error can be reduced.